/*** 
 * @Author: 王耀泽
 * @Date: 2025-03-14 00:14:08
 * @LastEditTime: 2025-03-14 00:14:12
 * @LastEditors: aigis
 * @Description: 15201563666
 * @FilePath: \vue-cesium2\src\minxi\drawPlot\DynamicWallMaterialProperty.js
 * @先看《地理信息导论第七版》
 */
function DynamicWallMaterialProperty(options) {
    this._definitionChanged = new Cesium.Event();
    this._color = undefined;
    this._colorSubscription = undefined;
    this.color = options.color || Color.BLUE;
    this.duration = options.duration || 1000;
    this.trailImage = options.trailImage;
    this._time = (new Date()).getTime();
}

/**
 * 带方向的墙体
 * @param {*} options.get:true/false
 * @param {*} options.count:数量 
 * @param {*} options.freely:vertical/standard
 * @param {*} options.direction:+/-
 */
function _getDirectionWallShader(options) {
    if (options && options.get) {
        var materail = "czm_material czm_getMaterial(czm_materialInput materialInput)\n\
            {\n\
                czm_material material = czm_getDefaultMaterial(materialInput);\n\
                vec2 st = materialInput.st;";
        if (options.freely == "vertical") { //（由下到上）
            materail += "vec4 colorImage = texture(image, vec2(fract(st.s), fract(float(" + options.count + ")*st.t" + options.direction + " time)));\n\ ";
        } else { //（逆时针）
            materail += "vec4 colorImage = texture(image, vec2(fract(float(" + options.count + ")*st.s " + options.direction + " time), fract(st.t)));\n\ ";
        }
        //泛光
        materail += "vec4 fragColor;\n\
                fragColor.rgb = (colorImage.rgb+color.rgb) / 1.0;\n\
                fragColor = czm_gammaCorrect(fragColor);\n\
                material.diffuse = colorImage.rgb;\n\
                material.alpha = colorImage.a;\n\
                material.emission = fragColor.rgb;\n\
                return material;\n\
            }";
        return materail
    }
}

Object.defineProperties(DynamicWallMaterialProperty.prototype, {
    isConstant: {
        get: function () {
            return false;
        }
    },
    definitionChanged: {
        get: function () {
            return this._definitionChanged;
        }
    },
    color: Cesium.createPropertyDescriptor('color')
});

var MaterialType = 'wallType' + parseInt(Math.random() * 1000);
DynamicWallMaterialProperty.prototype.getType = function (time) {
    return MaterialType;
};

DynamicWallMaterialProperty.prototype.getValue = function (time, result) {
    if (!Cesium.defined(result)) {
        result = {};
    }
    result.color = Cesium.Property.getValueOrClonedDefault(this._color, time, Cesium.Color.WHITE, result.color);
    result.image = this.trailImage;
    if (this.duration) {
        result.time = (((new Date()).getTime() - this._time) % this.duration) / this.duration;
    }
    viewer.scene.requestRender();
    return result;
};

DynamicWallMaterialProperty.prototype.equals = function (other) {
    return this === other ||
        (other instanceof DynamicWallMaterialProperty
            && Cesium.Property.equals(this._color, other._color))
};

Cesium.Material._materialCache.addMaterial(MaterialType, {
    fabric: {
        type: MaterialType,
        uniforms: {
            color: new Cesium.Color(1.0, 0.0, 0.0, 0.1),
            image: Cesium.Material.DefaultImageId,
            time: -20
        },
        source: _getDirectionWallShader({
            get: true,
            count: 3.0,
            freely: 'vertical',
            direction: '-'
        })
    },
    translucent: function (material) {
        return true;
    }
});
Cesium.DynamicWallMaterialProperty = DynamicWallMaterialProperty;
